I have a similar problem....  4 digit, 7 segment LDC display from Jameco (Item
17110).  No data, no brand on it, no makings anywhere -- nothing but the pretty
LCD display and it's 40 pins....   If you find anything, please let me know
too.  TIA

Lorick wrote:

> I ended up with a dual digit module of  a 7 segment display from Digikey
> (part 67-1421-ND)
> and it's got multiplexed pins.
>
> Is there a general scheme for figuring out the data control lines on this or
> otherwise how can I learn to use it?  I don't know the manufacturer off hand
> to look up spec sheets so I was wondering if someone offhand knew how to use
> multiplexed led displays.
>
> Right now I don't know what any of the pins do.  Don't even know where the
> common connection is.